Variables of influence on thermal performance of buildings under transient conditions

Residential buildings significantly increase electricity demand, especially in developing countries. In this case, the requirements addressed by the standards can ensure the climatic adequacy of the envelope, enhance thermal performance, and promote thermal comfort conditions while reducing energy c...

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Autors principals:	Ferreira, Camila Carvalho, Souza, Henor Artur de, Carlo, Joyce Correna
Format:	Online
Idioma:	eng
Publicat:	Universidade Estadual de Campinas 2021
Accés en línia:	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8661655
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id	oai:ojs.periodicos.sbu.unicamp.br:article-8661655
record_format	ojs
institution	Universidade Estadual de Campinas
collection	OJS
language	eng
format	Online
author	Ferreira, Camila Carvalho Souza, Henor Artur de Carlo, Joyce Correna
spellingShingle	Ferreira, Camila Carvalho Souza, Henor Artur de Carlo, Joyce Correna Variables of influence on thermal performance of buildings under transient conditions
author_facet	Ferreira, Camila Carvalho Souza, Henor Artur de Carlo, Joyce Correna
author_sort	Ferreira, Camila Carvalho
title	Variables of influence on thermal performance of buildings under transient conditions
title_short	Variables of influence on thermal performance of buildings under transient conditions
title_full	Variables of influence on thermal performance of buildings under transient conditions
title_fullStr	Variables of influence on thermal performance of buildings under transient conditions
title_full_unstemmed	Variables of influence on thermal performance of buildings under transient conditions
title_sort	variables of influence on thermal performance of buildings under transient conditions
description	Residential buildings significantly increase electricity demand, especially in developing countries. In this case, the requirements addressed by the standards can ensure the climatic adequacy of the envelope, enhance thermal performance, and promote thermal comfort conditions while reducing energy consumption. However, the criteria for evaluating the thermal performance of a building’s envelope that is commonly adopted in energy performance standards and codes have proved to be inefficient in hot climates. The heat exchanges within buildings are dependent on solar radiation and ventilation. The purpose of this article is to establish the variables with the greatest influence on the thermal performance of naturally ventilated dwellings in hot climates (equatorial, tropical and subtropical). For this investigation, a factorial design was adopted for sensitivity analysis. The structure of the factorial experiment defined the simulations of four patterns of single-family and multifamily residential buildings. We varied the thermophysical properties of the external walls and roofs, the heat gain coefficient of the openings, and natural ventilation. Brazil was adopted as a basis for climate analysis, including equatorial, tropical and subtropical climates. The analyses were based on comfort hours in an adaptive model and statistically evaluated using Analysis of Variance (ANOVA) tests. In general, the absorption of the walls and cover, the thermal transmittance of the cover and the natural ventilation were the variables of greatest influence on thermal comfort in a hot climate.
publisher	Universidade Estadual de Campinas
publishDate	2021
url	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8661655
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spelling	oai:ojs.periodicos.sbu.unicamp.br:article-86616552021-06-10T16:28:23Z Variables of influence on thermal performance of buildings under transient conditions Variáveis de influência no desempenho térmico de edificações em regime transiente Ferreira, Camila Carvalho Souza, Henor Artur de Carlo, Joyce Correna Desempenho térmico Edificações condicionadas naturalmente Normas Experimento fatorial Thermal performance Naturally ventilated buildings Standards Factorial design Residential buildings significantly increase electricity demand, especially in developing countries. In this case, the requirements addressed by the standards can ensure the climatic adequacy of the envelope, enhance thermal performance, and promote thermal comfort conditions while reducing energy consumption. However, the criteria for evaluating the thermal performance of a building’s envelope that is commonly adopted in energy performance standards and codes have proved to be inefficient in hot climates. The heat exchanges within buildings are dependent on solar radiation and ventilation. The purpose of this article is to establish the variables with the greatest influence on the thermal performance of naturally ventilated dwellings in hot climates (equatorial, tropical and subtropical). For this investigation, a factorial design was adopted for sensitivity analysis. The structure of the factorial experiment defined the simulations of four patterns of single-family and multifamily residential buildings. We varied the thermophysical properties of the external walls and roofs, the heat gain coefficient of the openings, and natural ventilation. Brazil was adopted as a basis for climate analysis, including equatorial, tropical and subtropical climates. The analyses were based on comfort hours in an adaptive model and statistically evaluated using Analysis of Variance (ANOVA) tests. In general, the absorption of the walls and cover, the thermal transmittance of the cover and the natural ventilation were the variables of greatest influence on thermal comfort in a hot climate. Os edifícios residenciais aumentam significativamente a demanda de eletricidade, especialmente nos países em desenvolvimento. Neste caso, os requisitos contemplados pelas normas podem garantir a adequação climática da envolvente e o melhor desempenho térmico, bem como promover condições de conforto térmico, ao mesmo tempo que reduz o consumo de energia. No entanto, os critérios para avaliar o desempenho térmico do envelope de um edifício comumente adotados em padrões e códigos de desempenho energético provaram ser ineficientes em climas quentes, nos quais as trocas de calor dentro dos edifícios dependem da radiação solar e ventilação. O objetivo deste artigo é estabelecer as variáveis com maior influência no desempenho térmico de residências ventiladas naturalmente em climas quentes (equatorial, tropical e subtropical). Para tal, o planejamento fatorial foi adotado para análise de sensibilidade. A estrutura do experimento fatorial definiu as simulações de quatro modelos de edifícios residenciais unifamiliares e multifamiliares, variando as propriedades termofísicas das paredes externas e coberturas, o fator solar das aberturas e o uso de ventilação natural. O Brasil foi adotado como base para as análises climáticas, incluindo climas equatorial, tropical e subtropical. As análises foram baseadas em horas de conforto em modelo adaptativo e avaliadas estatisticamente por meio de testes de Análise de Variância (ANOVA). Em geral, a absorção das paredes e cobertura, a transmitância térmica da cobertura e a ventilação natural foram as variáveis de maior influência para o conforto térmico em um clima quente. Universidade Estadual de Campinas 2021-08-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Text Texto application/pdf https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8661655 10.20396/parc.v12i00.8661655 PARC Pesquisa em Arquitetura e Construção; Vol. 12 (2021): Continous publication; e021023 PARC Pesquisa em Arquitetura e Construção; Vol. 12 (2021): Publicação contínua; e021023 PARC Pesquisa em Arquitetura e Construção; v. 12 (2021): Publicação contínua; e021023 1980-6809 eng https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8661655/27228 Brazil: contemporary Brasil; contemporâneo Copyright (c) 2021 PARC Pesquisa em Arquitetura e Construção https://creativecommons.org/licenses/by/4.0

Variables of influence on thermal performance of buildings under transient conditions

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